<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html version="4.01"><head><title>[retawq] Patent Issues</title></head>
<body text="#000000" bgcolor="#cccccc" link="#0000ff" vlink="#551a8b"
alink="#551a8b" lang="en">
<center><b><font size="+2">retawq Documentation</font><br><font
size="+1">Patent Issues</font></b></center>

<p>On this page, I try to collect some information about patents and especially
<i>expired</i> patents, mostly regarding TLS. This information might be wrong;
any corrections and additions are highly appreciated!</p>

<!-- <p>The <b>LZW</b> patent expired somewhere 20 June 2003. -- source:
lwn.net, "Weekly Edition for June 12, 2003"</p> -->

<p>The <b>RSA</b> patent expired in 2000.</p>

<p>The <b>Diffie-Hellman</b> (DH) patent expired in 1997.</p>

<p><hr>This documentation file is part of version 0.2.6c of <a
href="http://retawq.sourceforge.net/">retawq</a>, a network client created by
<span lang="de">Arne Thoma&szlig;en</span>. retawq is basically released under
certain versions of the GNU General Public License and WITHOUT ANY WARRANTY.
Copyright (C) 2001-2006 <a href="mailto:arne@arne-thomassen.de"><span
lang="de">Arne Thoma&szlig;en</span></a>.</p>
</body></html>
